The Russia striker has signed in a permanent deal from Spartak Moscow.
“I am very happy to be here and be a Fiorentina player. I hope I can show everyone my qualities and to bring many goals and victories to my new club," Kokorin said.
"I am very happy to be at Fiorentina. Since I was a kid I know what it means to be at Fiorentina. The club has a great history. I thank the directors for wanting me here and I hope to repay everyone for this opportunity," he continued.
“I want to thank everyone at Fiorentina for the trust, and for such a long contract. I am proud that the likes of [Fabio] Capello and [Roberto] Mancini spoke about me."